CALCIUM CARBONATE IS AN EXTREMELY VERSATILE MINERAL PRESENT IN MANY EVERYDAY ITEMS, FROM ADHESIVES AND SEALANTS THROUGH TO ANIMAL FEED AND LANDSCAPING.

Calcium Carbonate Usage in GLASS AND CERAMICS

Container Glass

Container glass, used to produce bottles and jars, is made from a specific mixture of sand, soda ash, limestone and other additives.

Limestone for glass-making must be of a very high purity and contain <0.035% iron oxide (Fe203). Iron is a serious impurity that can adversely affect the colour of the glass. At Egypt Mineral Ores [E.M.O.], our high-purity limestone quarry stone is suitable for the glass industry and contains extremely low levels of metal contaminants.

Flat Glass

Most flat glass is similar in composition to container glass except that it contains a higher proportion of magnesium oxide. Consequently, most lime is introduced using dolomite and only a little limestone is used to balance the CaO/MgO ratio.

The majority of flat glass is used in the production of high-quality glazing for homes, commercial and public buildings, vehicles, and horticultural applications.

Ceramics

Calcium carbonate has traditionally been a source of CaO in raw glazes and it can also be used in low-fire bodies to reduce fired shrinkage. It is also common to see calcium carbonate included in porous earthenware body recipes to prevent moisture expansion which otherwise causes glazes to craze.

The limestone grades available from Egypt Mineral Ores [E.M.O.] are suitable for all glass and ceramics applications. Browse our product list or contact our sales team for further information.

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